conf: Enforce supported options for certain timers

According to the documentation various timer options are only supported
by certain timer types. Add a post parse check to verify that the user
didn't specify invalid options.

Also fix the qemu command line parsing function to set correct default
values for the kvmclock timer so that it passes the new check.

src/conf/domain_conf.c

@@ -2924,6 +2924,61 @@ virDomainDefPostParseInternal(virDomainDefPtr def,
 
     if (virDomainDefRejectDuplicateControllers(def) < 0)
         return -1;
+
+    /* verify settings of guest timers */
+    for (i = 0; i < def->clock.ntimers; i++) {
+        virDomainTimerDefPtr timer = def->clock.timers[i];
+
+        if (timer->name == VIR_DOMAIN_TIMER_NAME_KVMCLOCK) {
+            if (timer->tickpolicy != -1) {
+                virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+                               _("timer %s doesn't support setting of "
+                                 "timer tickpolicy"),
+                               virDomainTimerNameTypeToString(timer->name));
+                return -1;
+            }
+        }
+
+        if (timer->tickpolicy != VIR_DOMAIN_TIMER_TICKPOLICY_CATCHUP &&
+            (timer->catchup.threshold != 0 ||
+             timer->catchup.limit != 0 ||
+             timer->catchup.slew != 0)) {
+            virReportError(VIR_ERR_XML_ERROR, "%s",
+                           _("setting of timer catchup policies is only "
+                             "supported with tickpolicy='catchup'"));
+            return -1;
+        }
+
+        if (timer->name != VIR_DOMAIN_TIMER_NAME_TSC) {
+            if (timer->frequency != 0) {
+                virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+                               _("timer %s doesn't support setting of "
+                                 "timer frequency"),
+                               virDomainTimerNameTypeToString(timer->name));
+                return -1;
+             }
+
+            if (timer->mode != -1) {
+                virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+                               _("timer %s doesn't support setting of "
+                                 "timer mode"),
+                               virDomainTimerNameTypeToString(timer->name));
+                return -1;
+             }
+        }
+
+        if (timer->name != VIR_DOMAIN_TIMER_NAME_PLATFORM &&
+            timer->name != VIR_DOMAIN_TIMER_NAME_RTC) {
+            if (timer->track != -1) {
+                virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+                               _("timer %s doesn't support setting of "
+                                 "timer track"),
+                               virDomainTimerNameTypeToString(timer->name));
+                return -1;
+            }
+        }
+    }
+
     return 0;
 }
 

src/qemu/qemu_command.c

@@ -10924,6 +10924,7 @@ qemuParseCommandLineCPU(virDomainDefPtr dom,
                     dom->clock.timers[j]->present = present;
                     dom->clock.timers[j]->tickpolicy = -1;
                     dom->clock.timers[j]->track = -1;
+                    dom->clock.timers[j]->mode = -1;
                     dom->clock.ntimers++;
                 } else if (dom->clock.timers[j]->present != -1 &&
                     dom->clock.timers[j]->present != present) {